Stone-sawing machine



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NITED STATES PATENT 1er-ICE.

FREDRICK BIELI-IEN, OF ST. JOSEPH, MISSOURI.

,STONE- SAWING MACHINE.

SPECIFICATION fOrming part 0f Letters Patent NO. 568,731, dated October 6, 1896.

Application filed AprilSO, 1895. Serial No. 547,665. (No model.)

To @ZZ whom it may con/cern,.-

Be it known that I, FREDRICK BIELHEN, a citizen of the United States, and a resident of St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Improvements in Stone-Sawing Machines; and I do hereby declare that`the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it'appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specication.

My invention has for its object a high-speed machine, capable of rapid sawing 'of stone with a gang of saws, and having great iirmness, strength, and durability; also the holding of the sash-frame securely in its correct position without lateral motion while swinging only back and forth in a true path or line.

By my construction I also do away with slides and with guides, rub-irons, (or boards,) and consequent frictions and adjustments; and by means of my continuous and positive chain-feed, as hereinafter described, I not only dispense Vwith any ratchet-feed, (which usually feeds once to every five or seven strokes of the saws,) but I give the saws at each stroke the same to cut.V I also avoid any friction-feed, which is a continuous annoyance because of continual slipping, my construction insuring a steady, uniform feed, feeding an equal portion at each stroke, and which is of great importance in rapid sawing.

Other important advantages are also obtained by my invention, such as improved means for raising and lowering the crankshaft, keeping the belt under the same tension during such raising or lowering, an improved structure of the driving-frame, dac., all as will hereinafter appear.

In the accompanying drawings, which illustrate a form of machine embodying my improvements, Figure 1 is a perspective view showing the general construction, some of the details being shown in other and larger views; Fig. 2, a side elevation showing the line-shaft; Fig. 3, a plan; Fig. 4, a front view; Fig. 5, a cross-section through the crank-shaft, boxes, frame, columns, &c., at

the front of the machine; Fig. 6, a longitudinal section of part of the same; Fig. 7, a detail, enlarged, of the bearing for the crankshaft and pulley-shaft; Fig. S, a detail, enlarged, being a rear view of the bevel-gears and their shaft and of the worm shaft, wormwheel, and adjacent parts; Fig. 9, a longitudinal central section, enlarged, through these bevel-gears and shaft, worm-wheel and its shaft, worm gear or screw, and 4sprocketwheels; Fig. 10, a detail, enlarged, showing a cross-section of the end of the worm-screw and its box; Fig. 11, an enlarged detail showing cog-wheels and sprocket in dotted lines; Fig. l2, a detail in perspective showing the mode of attaching the saw-blade and gang sides; Fig. 13, a detail, enlarged, in elevation, of the upper part of screw and sprocket; Fig. 14, arm attachment, lower one; Fig. l5, vibratory arm, upper connection, enlarged; Fig. 1G, a section 011 the line y y of Fig. l5; Fig. I7, a back view of the upper or vibratory connection.

Referring more particularly to Figs. l, 2, and 6, A is an iron driving-frame in which are the sliding boxes B B and a raising and lowering main driving or crank shaft O, supported in said boxes. The dotted lines in Fig. 6 indicate a portion of'an endless belt running' from any'convenient prime-motor shaft to the main'driving-pulley'D on said main shaft, thence over a take-up pulley E, supported by arms c' on boxes h, and thence to and over an adjustable pulley F, the 0bject of the take-up being to keep the belt under tension when the crank-shaft is raised or lowered. G G' are the cranks, one at each end of shaft, and h the crank-rods or pitmen connecting the cranks to the saw-sash I.

The frames or crank-shaft columns A are composed, at each side of the machine, of massivel castings a a2, seeurelybolted at the bottom with large bolts, as shown at a3 a4, through a wood sill-plate and down through the foundation. Under and on top of these columns, securely fastened or bolted, are large cast-iron plates a5. Between these plates and the columns are keys a, for the purpose of keeping the columns equal distances apart and in the proper position. At the top and bottom of these columnar castings d a2 the IOO wooden frame extends to the main saw-frame l( K, as shown at a7, and is there securely bolted with large bolts, as shown at as.

lf desired, wedges a" (see Fig. l) may be provided for properly adjusting the connections of the d rivin g-frame with the main sawframe.

The reciprocating saw-sash is shown at l.

L indicates a truck or carriage for the stone to be sawed; M, a distributor for delivering sand and water to the stone during the sawing, and having provision for lowering, raising, or adjusting the same.

A cross-shaft N, on top of the saw-frame K and driven from a long drum 3 (see Fig. 2 on any overhead shaft l, has at its end a sprocket-wheel n', and a chain la2 connects the same by a sproeketavheel n3 with the feeding devices. This shaft has no endwise motion, for this would interfere with the proper action. ol' the sprocket n and bevel-pinions U' and U, hereinafter mentioned. Vlieels if and a6 I make removable, say by stud or any well-known means, to increase or diminsh the feed for different kinds of stone. The wheel n3 also is fastened to and carries a small removable pinion n4, 0"et-tring with a larger intermediate gear yas on the frame, and which engages with a still larger gear n, which is provided with a small bolt or nut n.7, having a lever-handle, as shown in Fig. l, and a chain as extends from sprocket 72,9 on n (see Fig. ll) to another sprocket-wheel, O', on the shaft O, provided with a worm o2. By these means motion is transmitted to the sprocketwheel n3 and thence to the worm-shaft O. rlhe shaft N being the driving-shaft of the machine, and the sprocket-wheel 'n' being keyed fast to this shaft, the gear-wheels `n and a3 being connected by the belt n2, and n3 and n4 being fastened together, as above stated, 11:1, n, and n constitute a train of gears. )Vhen the driving-shaft N revolves, (it being driven, as heretofore stated, by a belt from the lineshaft pulley or drum 3,) it drives all the above. This shaft O is made to engage or disengage the worm-wheel P on a feedscrew 1). iVhen feeding for sawing, a slow feed is used. The worm o2 is then engaged and turns the wheels q', which are severally secured to one end of the vertical raising and lowering screws q2, and which are four in all, namely, one at each of the four corners of the main saw-frame, as shown, and four others, (13 and if, located in the crank-shaft columns. The screws (f impart motion to the screws g4 by means of the intermediate gears Z Z. Y

The worin-shaft O oL is moved in and out of gear by means of the shifter p2, (shown in Figs. l, 2, and 3,) and in Fig. l0 is shown the adjustable bearing-bloek of, which permits one end of this shaft to be shifted for this purpose.

To obtain a fast or slow feed, as may be needed, I use different-sized gears in place of n4, n, or n, and which thus admit of nine change-gears. For instance, to change the feed in the ratio of two to four I take off n" and substitute a large gear, and this will increase the speed of all the other gears, and consequently will feed the machine down faster.

The pinion n, for the purpose of ready removal, may have a thumb-bolt or nut like that shown at a7. These thumb-bolts serve to hold the gears in place. The gears n n* n.5 n are all supported on a bracket, (see Fig. 11,) and which isitself fastened to one of the upright timbers K, and it is made slotted, as also shown in Fig. l1, to enable the different changeable gears to be put in as required.

To give the saw-sash a rapid up-and-down movement, an independent feed mechanism is provided, as shown in the plan View, Fig.

Upon the cross-shaft N are tight and loose pulleys s, driven by a belt from an overhead drum 3, and also the smaller tight and loose pulleys t t', driven from the same drum by a erossbelt, (see Fig. 2,) and the tight pulley t, revolves this cross-shaft and is used to raise and lower the saws quickly to and from their work. The worm is thrown back by means of its shifter p2, and the clutch U, which slides upon a feather, is thrown into contact with the bevel-pinion V by means of the clutchshifter R and is thrown to the right when the saw-sash is required to be raised from the work and to the left when loweringr it to work.

The bevel-pinions U U are loose upon shaft- N and engage with the large bevel-gear V, which is secured to the worm-wheel l.

Below the wheel P (see Fig 9) and attached to one of the sprocket-wheels q/ is an endless chain iV, which passes more or less around and engages all the sprocket-wheels q on the vertical screws, as before mentioned, located upon the main corners of the main saw-frame and also similarly passes around and engages the sprocli'et-wheels q', attached to the vertical screws on the crank-shaft columns A, which serve to raise and lower the crankshaft simultaneously with the sawsash and thereby keeping the powerin line. The sawsash is strongly braced with diagonal braces 2 2 and the main frame with diagonal side braces 3 3. These, together with the massive frames, large bolts, and the adjusting-wedges above named, serve to keep the structure firm, rigid, and true to its work. One of the upper cross-heads is shown in Fig. l at X and the lower ones at Y. (See, also, the enlarged detail Figs. lll, l5, 1G, and 17, and in which K indicates vertical posts of the main sawframe, Z the pendulum vibratory hanger, and Z2 one of the housings for the raising and lowering screws q2.)

The tight and loose pulleys employed to drive shaft N are two sets-namely, S S, representing, say, twenty-four tight and loose ones used for feeding the machine down, and t t, representing eighteen tight and loose pnlleys to run the cross-shaft faster to raise and IOO IIO

plates and keys, and top and bottom timbers bolted to the same and to the main saw-frame, combined with the main driving-shaft and its rising and falling blocks supporting said shaft, and means for raising and lowering the same, substantially as and. for the purposes lset forth.

2. In combination with the iron drivingframe columns, and with their top and bottom timbers, and their plates and keys, and with the main shaft and its boxes adapted to be raised and lowered inv said columns, the main frame firmly bolted to such driving-frame, the saw-sash in the main frame, its pitman connected to a crank on the main shaft in the iron driving-frame, and the described means for raising and lowering equally and simultaneously the main shaft and the saw-sash to preserve their proper relative alinements, all substantially as set forth.

3. In a stone-sawing machine, the combination With the iron driving-frame connected `to the Wooden saw-frame substantially as set forth7 of the described feed devices, consisting of the non-shifting cross-shaft N, its sprocket-wheel n, and chain n2, sprocket n3, pinion n4, gears a5, n, each removable and changeable for varying the feed, chain ns, sprocket n, sprocket o', adjustable wormshaft O, 02,or1n-ivheel I), and its feed-screw p', and the described system of vertical screws, their sprocket-wheels and endless chain engaging therewith.

4. In combination, the non-reciprocating cross-shaft N, its clutch U and gears U', the feed-screw p', Worm-wheel P, Worm-shaft O, 02, adapted at one end to be swung into and out of engagement with Wheel P, and a shifter p2, for effecting such engagement and disengagement.

5. In combination, the iron columnar castings a', a2, the Wooden sills beneath and the wooden frame above the same, and the plates a5, a5, and their keys a, 0.6, all substantially as and for the purposes set forth.

FREDRICK BIELHEN. Witnesses:

KEER. M. MITCHELL, ERNEST L. SMITH. 

